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authorSam Ravnborg <sam@mars.ravnborg.org>2006-01-22 07:34:15 -0500
committerSam Ravnborg <sam@mars.ravnborg.org>2006-02-19 03:51:20 -0500
commit20a468b51325b3636785a8ca0047ae514b39cbd5 (patch)
tree22e8d00b947cd110c9d600d24c4119ff30ff22c1 /scripts/Kbuild.include
parentb39927cf4cc5a9123d2b157ffd396884cb8156eb (diff)
kbuild: make cc-version available in kbuild files
Move $(CC) support functions to Kbuild.include so they are available in the kbuild files. In addition the following was done: o as-option documented in Documentation/kbuild/makefiles.txt o Moved documentation to new section to match new scope of functions o added cc-ifversion used to conditionally select a text string dependent on actual $(CC) version o documented cc-ifversion o change so Kbuild.include is read before the kbuild file Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'scripts/Kbuild.include')
-rw-r--r--scripts/Kbuild.include37
1 files changed, 37 insertions, 0 deletions
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 0168d6c37075..92ce94b58bd6 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -44,6 +44,43 @@ define filechk
44 fi 44 fi
45endef 45endef
46 46
47######
48# cc support functions to be used (only) in arch/$(ARCH)/Makefile
49# See documentation in Documentation/kbuild/makefiles.txt
50
51# as-option
52# Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,)
53
54as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \
55 -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \
56 else echo "$(2)"; fi ;)
57
58# cc-option
59# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
60
61cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
62 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
63
64# cc-option-yn
65# Usage: flag := $(call cc-option-yn, -march=winchip-c6)
66cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
67 > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
68
69# cc-option-align
70# Prefix align with either -falign or -malign
71cc-option-align = $(subst -functions=0,,\
72 $(call cc-option,-falign-functions=0,-malign-functions=0))
73
74# cc-version
75# Usage gcc-ver := $(call cc-version, $(CC))
76cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \
77 $(if $(1), $(1), $(CC)))
78
79# cc-ifversion
80# Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1)
81cc-ifversion = $(shell if [ $(call cc-version, $(CC)) $(1) $(2) ]; then \
82 echo $(3); fi;)
83
47### 84###
48# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj= 85# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
49# Usage: 86# Usage: